Paint-strainer.



E. M. ROSENTHAL.

PAINT STRAINER.

APPLICATION FILED AUG. 12, I916.

Patented May1,1917.

2 SHEETS-SHEET l.

E. M. ROSENTHAL.

PAINT STRAINER.

APPLICATION HLED AUG.12, 191s.

Patented May 1, 1917.

2 SHEETS-SHEET 2- EDWARD 1VI. ROSENTI-IAL, OF CHICAGO, ILLINOIS, ASSIGNOR TO BRADLEY & VROOMAN C0,, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PAINT-STRAINER.

Specification of Letters Patent.

Patented May 1, 1917.

Application filed August 12, 1916. Serial No. 114,496.

To all whom it may concern:

Be it known that I, EDWARD M. ROSEN- THAL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Paint- Strainers, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

When paint or other similar liquids must in the course of manufacture be strained the material is of such a character that it will not flow by gravity through a strainer of the required mesh, and it is necessary to provide mechanical means for feeding the paint over the openings in the strainer for the double purpose of forcing the desired quality of paint through the strainer and removing the large or lumpy parts of the paint or impurities therein from the surface of the strainer, so that part which is desired to go through may do so.

The object of'the invention is to provide a device for accomplishing the result above set forth, which can be very easily and cheaply made, which is simple in operation, and not readily liable to get out of order.

The invention consists in a device capable of carrying out the foregoing objects, and particularly one having special features and details of construction hereafter set forth in the specification and claims.

Referring to the drawings, in which similar numerals indicate the same parts throughout the several views,

Figure 1 is a central longitudinal sectional view of mechanism illustrating this invention in its preferred form.

Fig. 2 is a transverse sectional view of the parts illustrated in Fig. 1.

Fig. 8 is a plan view of the same device.

Fig. 4 is a perspective view of the specially designed sieve mechanism removed from other parts of the device.

In the particular embodiment of the invention illustrated in the drawings, a rectangular horizontal. frame support 10 is provided, elevated a suitable distance from the floor on metallic end frames 12, joined together by suitable side tie rods 14. Suspended upon certain of these tie rods is a metallic drainage trough 16 of any suitable construction, designed to conduct the paint away.

liesting in and upon this frame 10 is the semicylindrical trough-like sieve strainer illustrated in perspective in Fig. 4.

The body of the strainer consists of segmental imperforate end plates 20 having extending therefrom top flanges 22 adapted to rest upon the ends of the frame 10. Rigidly secured to these end plates 20 by any suitable means, such as soldering, is a metallic base plate 24, that is a segment of a hollow cylinder, preferably semi -cylindrical of relatively strong material provided with relatively large perforations-26, as clearly shown in Fig. 4. Ends 20 and the perforated plate 24 are of such strength that the mechanism hereafter described for forcing the paint through the strainer, may operate thereon without the parts 20 and 24 yielding to any practical extent. These parts, therefore, form a suitable support for the real strainer.

The strainer proper is close to base plate 24 to be supported thereby and consist of wire cloth fabric 30 of suitable mesh, also a segment of a hollow cylinder semicylindrical, to wires to the inch, cut of a length equal to the distance between the end members 20 heretofore described so that it may be readily inserted and removed inside the metallic frame 2024 as desired, and detachably secured in place by segmental plates or blocks 32, detachably connected to the end members 20 heretofore described by adjustable bolts 34;

The upper edges of the wire fabric are, as clearly appears in the drawing, bent over upwardly and outwardly extending flanges 24 of the plate 24 and secured thereto by U shaped strips of solid metal 86, placed in the position clearly appearing in Fig. 4. The flanges 24 are not perforated so that any paint which is on the screen 30 above the bottoms of these flanges 24 cannot flow through the screen, this to prevent paint which is above the upper surface of the the Wire screen 80 without there being anyundue yielding of the screen.

J ournaled in suitable bearings 40 provided for the purpose in the members 20 heretofore described, and in brackets 42, attached to the frame 10, is a horizontal shaft 44 rotatable by any suitable means, such,

for instance as a handle.46 and coaxial with the strainer 30 and plate 24. Rigidly mounted upon this shaft 44 are a plurality of longitudinally spaced spokes 48 or arms,

and suitably supported on adjacent pairs of arms, are longitudinal bars or wipers 50, reciprocable radially of the spokes 48 under the action of springs 52. The shaft 44 is detachable because the bearings at 42 are provided with separable caps 70 hinged at 7 2 and detachably secured by suitable locking devices, such as pins 73. By loosening the pins 73 and rotating the caps, the shaft and detachable parts may be lifted out, and after it has been lifted out the semicylindrical sieve may be lifted out and manipulated as heretofore described. The outer edges of the members are preferably equipped with some relatively soft cushioning or yielding material, such as a strip of leather 54.

By rotating the handle 46, and consequently the shaft 44, the members 50, which are outwardly spring pressed Squeegees, are

caused to travel over the surface of the wire screen 30 in the obvious manner, and the leather members 54 are forced by the movement of the bars 50 under the action of spring 48 into contact therewith in all positions of the device notwithstanding slight obstruction in the paint which is to be strained may seek to obstruct the passage of the members 50.

Among the advantages flowing from this construction heretofore described are; that adapted to travel over the surface of said strainer, and reciprocable to and from the strainer, spring means urging the bar toward the strainer, and means for moving said bar over the surface of the strainer.

2. In combination with a suitable support, a strainer member carried thereby, a bar provided with a flexible cushion bearing on the strainer adapted to travel over the sur face of said strainer, means rendering the bar reciprocable to and from the strainer, spring means urging the bar toward the strainer, and means for moving said bar over the surface of the strainer.

3. In a device of the class described, the combination with a frame and a suitably arranged conductor below it, a semicylindrical I strainer fitting in the top of the frame and supported thereby, a shaft carried by the frame extending longitudinally on the strainer, spokes upon said shaft extending toward the interior surface of the strainer, wiper bars carried by said spokes, reciprocable longitudinally of said spokes, and fiexible cushions upon the surfaces of the wiper bars contacting the strainer, all arranged as shown and described forthe purposes set forth.

4. In a strainer, the combination of a pair of imperforate end members, a connecting semicylindrical coarsely perforated member,

a sheet of finely perforated material inside of said .coarsely perforated member, semicylindrical securing members fitted inside of the end member and contacting the finely perforated sheet to hold it in place and means for detachably securing the last men tioned members to the end members.

5. In a strainer, the combination of a pair of imperforate end members, a connecting semicylindrical member, coarsely perforated except as to flanges extending substantially above the upper surfaces of the end members, a sheet of finely perforated material inserted between the ends and in contact with the interior surface of the coarsely perforated member, means engaging the end members for securing the finely perforated sheet in place, and means for securing the outer edges of said finely perforated sheet over the edges of said imperforate flanges of the coarsely perforated member.

6. In a device of the class described, a trough comprising a semicylindrical sup porting member coarsely perforated except as to strips along the upper edges, a lining of relatively finely perforated material inside the coarsely perforated material, the edges of the finely perforated material being bent over the upper edges of the coarsely perforated material, strips of metal bent in U shaped form over the edges of the coarsely perforated member securing the finely perforated member thereto, and suitable end members for the trough, for the purposes set forth.

7. In combination with a suitable support, a strainer carried thereby and in the form of a segment of a hollow cylinder, a bar adapted to travel over the surface of said strainer and reoiprocable to and from the strainer, and means for moving said bar over the surface of the strainer.

8. In combination with a suitable support, a strainer carried thereby and in the form of a segment of ahollow cylinder, a bar adapted to travel over the surface of said strainer and reciprocable, spring means urging the bar toward the strainer, and a rotatable shaft coaxial with said strainer and carrying said bar.

9. In combination with a suitable support, a strainer carried thereby and in the form of a segment of a hollow cylinder, a bar adapted to travel over the surface of said strainer and reciprocable to and from the strainer,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, I

means for moving said bar over the surface of the strainer, and a strainer supporting base plate close to the strainer and having relatively large perforations.

10. In combination with a suitable support, a strainer carried thereby and in the form of a segment of a hollow cylinder, a bar adapted to travel over the surface of said strainer and reciprocable, spring means urging the bar toward the strainer, a rotatable shaft coaxial with said strainer and carrying said bar, and a strainer supporting base plate close to the strainer and having relatively large perforations.

11. In combination with a suitable support, a strainer member carried thereby, a bar adapted to travel over the surface of said strainer and reoiprocable to and from the strainer, spring means urging the bar toward the strainer, means for moving said bar over the surface of the strainer, and a strainer supporting base plate close to the strainer and having relatively large perforations.

In witness whereof, I hereunto subscribe my name this 9th day of August, A. D. 1916.

EDI/VARD M. ROSENTHAL.

Witnesses:

F. A. MAW, F. F. BRADLEY.

Washington, D. G. 

